diff --git a/zfs_backup.py b/zfs_backup.py
index bfea1d0..0d32def 100755
--- a/zfs_backup.py
+++ b/zfs_backup.py
@@ -477,11 +477,11 @@ class Time:
 
         %a: day of week, short version
         %b: month, short version
-        %e: day of month, space-padded
+        %d: day of month, zero-padded
         %H, %M, %S: hour, minute, second, zero-padded
         %Y: year
         """
-        return "%a %b %e %H:%M:%S %Y"
+        return "%a %b %d %H:%M:%S %Y"
 
     @classmethod
     def _extract_datetime_segment(cls, line_with_datetime: str) -> str: